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<p>Based on the unique ferromagnetism and excellent synergistic effects of magnetic–dielectric loss, the Fe-metal organic framework (MOF) is always regarded as promising electromagnetic wave absorber. However, the low dielectric loss of MOF always restricts the enhancement of electromagnetic wave absorption performance. Therefore, the introduction of multiple conjugated rings on organic ligands to enhance the dielectric loss of MOF may be the effective way to address this issue. Here, a novel Fe-based MOF has been successfully fabricated through a hydrothermal method based on 2,3-quinoline dicarboxylic acid, a typical organic ligand with multiple conjugated rings. The as-synthesized Fe-MOF exhibits a large specific surface area and good thermal stability under nitrogen atmosphere. To further enhance the electromagnetic wave absorption (EMWA) performance, the Fe/C composite has been prepared based on the precursors of Fe-MOF through carbonization at 400°C under a nitrogen environment. The investigation of EMWA shows that the RL<sub>min</sub> of Fe-MOFs is −&#xa0;16.23&#xa0;dB at 14.80&#xa0;GHz with a thickness of 5.5&#xa0;mm. After carbonization, the calculated RL<sub>min</sub> value of the Fe/C composite at 9.68&#xa0;GHz is −&#xa0;55.9&#xa0;dB with a thickness of 4.5&#xa0;mm. Significantly, the EAB of Fe/C composite covers most of the X-band.</p> Graphical Abstract <p></p>

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The Synthesis of Fe-MOF with the Effective Electromagnetic Wave Absorption Performance

  • 期刊论文

  • 发表日期：

    2025年12月17日

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  • Yujie Li,
  • Shi Li,
  • Yuting Zhu,
  • Liwei Zhu,
  • Bingchuan Yang

摘要

Based on the unique ferromagnetism and excellent synergistic effects of magnetic–dielectric loss, the Fe-metal organic framework (MOF) is always regarded as promising electromagnetic wave absorber. However, the low dielectric loss of MOF always restricts the enhancement of electromagnetic wave absorption performance. Therefore, the introduction of multiple conjugated rings on organic ligands to enhance the dielectric loss of MOF may be the effective way to address this issue. Here, a novel Fe-based MOF has been successfully fabricated through a hydrothermal method based on 2,3-quinoline dicarboxylic acid, a typical organic ligand with multiple conjugated rings. The as-synthesized Fe-MOF exhibits a large specific surface area and good thermal stability under nitrogen atmosphere. To further enhance the electromagnetic wave absorption (EMWA) performance, the Fe/C composite has been prepared based on the precursors of Fe-MOF through carbonization at 400°C under a nitrogen environment. The investigation of EMWA shows that the RLmin of Fe-MOFs is − 16.23 dB at 14.80 GHz with a thickness of 5.5 mm. After carbonization, the calculated RLmin value of the Fe/C composite at 9.68 GHz is − 55.9 dB with a thickness of 4.5 mm. Significantly, the EAB of Fe/C composite covers most of the X-band.

Graphical Abstract